Android 学生信息管理系统

今天上课老师让利用ListView和数据库做一个学员信息管理系统。下面我就把自己做的代码复制下来，供大家参考。

首页的布局main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <RelativeLayout android:id="@+id/RelativeLayout"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content">
        <Button android:id="@+id/bn_search_id" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:text="搜索"
            android:gravity="center_vertical" />
        <Button android:gravity="center" 
            android:text="@string/myButton"
            android:id="@+id/btn_add_student" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:layout_alignParentTop="true"
            android:layout_toRightOf="@+id/bn_search_id" 
            android:layout_toLeftOf="@+id/bn_select" />
        <Button  android:gravity="center_vertical"
            android:text="选择" 
            android:id="@+id/bn_select" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"></Button>
    </RelativeLayout>
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="              ID            姓 名       年 龄         性 别        "
    />
    <ListView android:id="@android:id/list"
    android:layout_width="fill_parent" 
    android:layout_weight="1"
    android:layout_height="wrap_content"/>
    <LinearLayout 
        android:orientation="horizontal"
        android:id="@+id/showLiner"
        android:visibility="gone"    
         android:layout_width="fill_parent"
         android:layout_height="wrap_content">
         <Button 
         android:id="@+id/bn_delete"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="删除"
         android:enabled="false"
         />     
         <Button 
         android:id="@+id/bn_selectall"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="全选"
         />
         <Button 
         android:id="@+id/bn_canel"
        android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="取消"
         />   
         </LinearLayout>
        
</LinearLayout>

创建listView中显示学员信息的xml格式 student_list_item.xml

<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android"
    android:orientation= "horizontal"
    android:layout_width= "fill_parent"
    android:layout_height= "wrap_content" >
    <ImageView android:layout_width= "fill_parent"
        android:layout_height= "wrap_content"
        android:layout_gravity= "center"
        android:layout_weight= "1"
        android:background= "@drawable/icon" />
    <TextView android:id= "@+id/tv_stu_id"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1" />
    <TextView android:id= "@+id/tv_stu_name"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1" />

    <TextView android:id= "@+id/tv_stu_age"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1" />
    <TextView android:id= "@+id/tv_stu_sex"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1" />

    <TextView android:id= "@+id/tv_stu_likes"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1"
        android:visibility= "gone" />
    <TextView android:id= "@+id/tv_stu_phone"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1"
        android:visibility= "gone" />
    <TextView android:id= "@+id/tv_stu_traindate"
        android:layout_width= "fill_parent"
        android:layout_height= "wrap_content"
        android:layout_gravity= "center"
        android:layout_weight= "1"
        android:visibility= "gone" />
    <TextView android:id= "@+id/tv_stu_modifyDateTime"
        android:layout_width= "fill_parent"
        android:layout_gravity= "center"
        android:layout_height= "wrap_content"
        android:layout_weight= "1"
        android:visibility= "gone" />

    <CheckBox
        android:id= "@+id/cb_box"
        android:layout_width= "fill_parent"
        android:layout_height= "wrap_content"
        android:layout_weight= "1"
        android:visibility= "gone"
        android:checked= "false"
        android:focusable= "false"
    />
</LinearLayout>

　　创建一个StudentListActivity做为主页显示学员信息以及进行一些操作。

package cn.yj3g.student.activity;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;
import cn.yj3g.student.dao.StudentDao;
import cn.yj3g.student.db.StudentDBHelper;
import cn.yj3g.student.entry.Student;
import cn.yj3g.student.entry.TableContanst;

public class StudentListActivity extends ListActivity implements
        OnClickListener, OnItemClickListener, OnItemLongClickListener {

    private static final String TAG = "TestSQLite";
    private Button addStudent;
    private Cursor cursor;
    private SimpleCursorAdapter adapter;
    private ListView listView;
    private List<Long> list;
    private RelativeLayout relativeLayout;
    private Button searchButton;
    private Button selectButton;
    private Button deleteButton;
    private Button selectAllButton;
    private Button canleButton;
    private LinearLayout layout;
    private StudentDao dao;
    private Student student;
    private Boolean isDeleteList = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.e(TAG, "onCreate");
        list = new ArrayList<Long>();
        student = new Student();
        dao = new StudentDao(new StudentDBHelper(this));
        addStudent = (Button) findViewById(R.id.btn_add_student);
        searchButton = (Button) findViewById(R.id.bn_search_id);
        selectButton = (Button) findViewById(R.id.bn_select);
        deleteButton = (Button) findViewById(R.id.bn_delete);
        selectAllButton = (Button) findViewById(R.id.bn_selectall);
        canleButton = (Button) findViewById(R.id.bn_canel);
        layout = (LinearLayout) findViewById(R.id.showLiner);
        relativeLayout=(RelativeLayout) findViewById(R.id.RelativeLayout);
        listView = getListView();

        // 为按键设置监听
        addStudent.setOnClickListener(this);
        searchButton.setOnClickListener(this);
        selectButton.setOnClickListener(this);
        deleteButton.setOnClickListener(this);
        canleButton.setOnClickListener(this);
        selectAllButton.setOnClickListener(this);
        listView.setOnItemClickListener(this);
        listView.setOnItemLongClickListener(this);
        listView.setOnCreateContextMenuListener(this);

    }

    @Override
    protected void onStart() {
        // 调用load()方法将数据库中的所有记录显示在当前页面
        super.onStart();
        load();

    }

    public void onClick(View v) {
        // 跳转到添加信息的界面
        if (v == addStudent) {
            startActivity(new Intent(this, AddStudentActivity.class));
        } else if (v == searchButton) {
            // 跳转到查询界面
            startActivity(new Intent(this, StudentSearch.class));
        } else if (v == selectButton) {
            // 跳转到选择界面
            isDeleteList = !isDeleteList;
            if (isDeleteList) {
                checkOrClearAllCheckboxs(true);
            } else {
                showOrHiddenCheckBoxs(false);
            }
        } else if (v == deleteButton) {
            // 删除数据
            if (list.size() > 0) {
                for (int i = 0; i < list.size(); i++) {
                    long id = list.get(i);
                    Log.e(TAG, "delete id=" + id);
                    int count = dao.deleteStudentById(id);
                }
                dao.closeDB();
                load();
            }
        } else if (v == canleButton) {
            // 点击取消，回到初始界面
            load();
            layout.setVisibility(View.GONE);
            isDeleteList = !isDeleteList;
        } else if (v == selectAllButton) {
            // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选
            selectAllMethods();
        }
    }
    // 创建菜单
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.layout.menu, menu);
    }

    // 对菜单中的按钮添加响应时间
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        int item_id = item.getItemId();
        student = (Student) listView.getTag();
        Log.v(TAG, "TestSQLite++++student+" + listView.getTag() + "");
        final long student_id = student.getId();
        Intent intent = new Intent();
        // Log.v(TAG, "TestSQLite+++++++id"+student_id);
        switch (item_id) {
        // 添加
        case R.id.add:
            startActivity(new Intent(this, AddStudentActivity.class));
            break;
        // 删除
        case R.id.delete:
            deleteStudentInformation(student_id);
            break;
        case R.id.look:
            // 查看学生信息
            // Log.v(TAG, "TestSQLite+++++++look"+student+"");
            intent.putExtra("student", student);
            intent.setClass(this, ShowStudentActivity.class);
            this.startActivity(intent);
            break;
        case R.id.write:
            // 修改学生信息
            intent.putExtra("student", student);
            intent.setClass(this, AddStudentActivity.class);
            this.startActivity(intent);
            break;
        default:
            break;
        }
        return super.onContextItemSelected(item);
    }

    // 创建一个按钮菜单
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(1, 1, 1, "按入学日期排序");
        menu.add(1, 2, 1, "按姓名进行排序");
        menu.add(1, 5, 1, "按学号进行排序");
        menu.add(1, 3, 1, "模糊查找");
        menu.add(1, 4, 1, "退出");
        return super.onCreateOptionsMenu(menu);
    }

    // 对菜单中的按钮添加响应时间
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        switch (id) {
        // 排序
        case 1:
            cursor = dao.sortByTrainDate();
            load(cursor);
            break;

        // 排序
        case 2:
            cursor = dao.sortByName();
            load(cursor);
            break;
        // 查找
        case 3:
            startActivity(new Intent(this, StudentSearch.class));
            break;
        // 退出
        case 4:
            finish();
            break;
        case 5:
            cursor = dao.sortByID();
            load(cursor);
            break;
        default:
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    // 长点击一条记录触发的时间
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view,
            int position, long id) {
        Student student = (Student) dao.getStudentFromView(view, id);
        listView.setTag(student);
        return false;
    }

    // 点击一条记录是触发的事件
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        if (!isDeleteList) {
            student = dao.getStudentFromView(view, id);
            // Log.e(TAG, "student*****" + dao.getStudentFromView(view, id));
            Intent intent = new Intent();
            intent.putExtra("student", student);
            intent.setClass(this, ShowStudentActivity.class);
            this.startActivity(intent);
        } else {
            CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
            box.setChecked(!box.isChecked());
            list.add(id);
            deleteButton.setEnabled(box.isChecked());
        }
    }

    // 自定义一个加载数据库中的全部记录到当前页面的无参方法
    public void load() {
        StudentDBHelper studentDBHelper = new StudentDBHelper(
                StudentListActivity.this);
        SQLiteDatabase database = studentDBHelper.getWritableDatabase();
        cursor = database.query(TableContanst.STUDENT_TABLE, null, null, null,
                null, null, TableContanst.StudentColumns.MODIFY_TIME + " desc");
        startManagingCursor(cursor);
        adapter = new SimpleCursorAdapter(this, R.layout.student_list_item,
                cursor, new String[] { TableContanst.StudentColumns.ID,
                        TableContanst.StudentColumns.NAME,
                        TableContanst.StudentColumns.AGE,
                        TableContanst.StudentColumns.SEX,
                        TableContanst.StudentColumns.LIKES,
                        TableContanst.StudentColumns.PHONE_NUMBER,
                        TableContanst.StudentColumns.TRAIN_DATE }, new int[] {
                        R.id.tv_stu_id, R.id.tv_stu_name, R.id.tv_stu_age,
                        R.id.tv_stu_sex, R.id.tv_stu_likes, R.id.tv_stu_phone,
                        R.id.tv_stu_traindate });
        listView.setAdapter(adapter);
    }

    // 自定义一个加载数据库中的全部记录到当前页面的有参方法
    public void load(Cursor cursor) {
        adapter = new SimpleCursorAdapter(this, R.layout.student_list_item,
                cursor, new String[] { TableContanst.StudentColumns.ID,
                        TableContanst.StudentColumns.NAME,
                        TableContanst.StudentColumns.AGE,
                        TableContanst.StudentColumns.SEX,
                        TableContanst.StudentColumns.LIKES,
                        TableContanst.StudentColumns.PHONE_NUMBER,
                        TableContanst.StudentColumns.TRAIN_DATE }, new int[] {
                        R.id.tv_stu_id, R.id.tv_stu_name, R.id.tv_stu_age,
                        R.id.tv_stu_sex, R.id.tv_stu_likes, R.id.tv_stu_phone,
                        R.id.tv_stu_traindate });
        listView.setAdapter(adapter);
    }

    // 全选或者取消全选
    private void checkOrClearAllCheckboxs(boolean b) {
        int childCount = listView.getChildCount();
        // Log.e(TAG, "list child size=" + childCount);
        for (int i = 0; i < childCount; i++) {
            View view = listView.getChildAt(i);
            if (view != null) {
                CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                box.setChecked(!b);
            }
        }
        showOrHiddenCheckBoxs(true);
    }

    // 显示或者隐藏自定义菜单
    private void showOrHiddenCheckBoxs(boolean b) {
        int childCount = listView.getChildCount();
        // Log.e(TAG, "list child size=" + childCount);
        for (int i = 0; i < childCount; i++) {
            View view = listView.getChildAt(i);
            if (view != null) {
                CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                int visible = b ? View.VISIBLE : View.GONE;
                box.setVisibility(visible);
                layout.setVisibility(visible);
                deleteButton.setEnabled(false);
            }
        }
    }

    // 自定义一个利用对话框形式进行数据的删除

    private void deleteStudentInformation(final long delete_id) {
        // 利用对话框的形式删除数据
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("学员信息删除")
                .setMessage("确定删除所选记录?")
                .setCancelable(false)
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        int raws = dao.deleteStudentById(delete_id);
                        layout.setVisibility(View.GONE);
                        isDeleteList = !isDeleteList;
                        load();
                        if (raws > 0) {
                            Toast.makeText(StudentListActivity.this, "删除成功!",
                                    Toast.LENGTH_LONG).show();
                        } else
                            Toast.makeText(StudentListActivity.this, "删除失败!",
                                    Toast.LENGTH_LONG).show();
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.cancel();
                    }
                });
        AlertDialog alert = builder.create();
        alert.show();
    }

    // 点击全选事件时所触发的响应
    private void selectAllMethods() {
        // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选
        if (selectAllButton.getText().toString().equals("全选")) {
            int childCount = listView.getChildCount();
            for (int i = 0; i < childCount; i++) {
                View view = listView.getChildAt(i);
                if (view != null) {
                    CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                    box.setChecked(true);
                    deleteButton.setEnabled(true);
                    selectAllButton.setText("取消全选");
                }
            }
        } else if (selectAllButton.getText().toString().equals("取消全选")) {
            checkOrClearAllCheckboxs(true);
            deleteButton.setEnabled(false);
            selectAllButton.setText("全选");
        }
    }
}

menu.xml文件

   
   
   
   

    
    
    
    
 <menu xmlns:android="http://schemas.android.com/apk/res/android"> 
    
    
    
    
 
    
    
    
    
 <group android:checkableBehavior="single"> 
    
    
    
    
 <item android:id="@+id/delete" android:title="删除学员信息" /> 
    
    
    
    
 <item android:id="@+id/look" android:title="详细信息" /> 
    
    
    
    
 <item android:id="@+id/add" android:title="添加学员信息" /> 
    
    
    
    
 <item android:id="@+id/write" android:title="修改学员信息" /> 
    
    
    
    
 </group> 
    
    
    
    
 </menu>
   
   
   
   

界面效果图如下：

删除界面：

在点击ListView中的一条Item时，老师要求显示出这个学生的详细信息，所以需要一个xml文件来显示这个信息。在这里我创建了一个student_info.xml文件

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:orientation="vertical"
  4     android:layout_width="fill_parent"
  5     android:layout_height="fill_parent"
  6     android:padding="5dip"
  7     >
  8     <TextView android:id="@+id/id2_text_id"
  9         android:layout_width="80dip"
 10         android:layout_height="40dip"
 11         android:layout_marginRight="5dip"
 12         android:layout_marginTop="5dip"
 13         android:layout_marginBottom="5dip"
 14         android:textSize="16sp"
 15         android:gravity="left|center_vertical"
 16         android:text="学员ID："
 17     />
 18     
 19     <TextView android:id="@+id/tv_info_id"
 20         android:layout_width="fill_parent"
 21         android:layout_height="40dip"
 22         android:layout_toRightOf="@id/id2_text_id"
 23         android:layout_alignParentRight="true"
 24         android:layout_alignTop="@id/id2_text_id"
 25         android:gravity="left|center_vertical"
 26     />
 27     
 28     <TextView android:id="@+id/name2_text_id"
 29         android:layout_width="80dip"
 30         android:layout_height="40dip"
 31         android:layout_marginRight="5dip"
 32         android:layout_marginTop="5dip"
 33         android:layout_marginBottom="5dip"
 34         android:layout_below="@id/id2_text_id"
 35         android:layout_alignLeft="@id/id2_text_id"
 36         android:textSize="16sp"
 37         android:gravity="left|center_vertical"
 38         android:text="姓名："
 39     />
 40     
 41     <TextView android:id="@+id/tv_info_name"
 42         android:layout_width="fill_parent"
 43         android:layout_height="40dip"
 44         android:layout_toRightOf="@id/name2_text_id"
 45         android:layout_alignParentRight="true"
 46         android:layout_alignTop="@id/name2_text_id"
 47         android:gravity="left|center_vertical"
 48     />
 49     
 50     <TextView android:id="@+id/age2_text_id"
 51         android:layout_width="80dip"
 52         android:layout_height="40dip"
 53         android:gravity="left|center_vertical"
 54         android:layout_marginRight="5dip"
 55         android:layout_below="@id/name2_text_id"
 56         android:layout_marginBottom="5dip"
 57         android:textSize="16sp"
 58         android:text="年龄："
 59     />
 60     
 61     <TextView android:id="@+id/tv_info_age"
 62         android:layout_width="fill_parent"
 63         android:layout_height="40dip"
 64         android:layout_toRightOf="@id/age2_text_id"
 65         android:layout_alignParentRight="true"
 66         android:layout_alignTop="@id/age2_text_id"
 67         android:gravity="left|center_vertical"
 68     />
 69     
 70     <TextView android:id="@+id/sex2_text_id"
 71         android:layout_width="80dip"
 72         android:layout_height="40dip"
 73         android:gravity="left|center_vertical"
 74         android:layout_below="@id/age2_text_id"
 75         android:layout_alignLeft="@id/age2_text_id"
 76         android:layout_marginRight="5dip"
 77         android:layout_marginBottom="5dip"
 78         android:text="性别："
 79         android:textSize="16sp"
 80     />
 81     
 82     <TextView
 83         android:id="@+id/tv_info_sex"
 84         android:layout_width="fill_parent"
 85         android:layout_height="40dip"
 86         android:layout_toRightOf="@id/sex2_text_id"
 87         android:layout_alignParentRight="true"
 88         android:layout_alignTop="@id/sex2_text_id"
 89         android:gravity="left|center_vertical"
 90         />
 91     
 92     <TextView  android:id="@+id/like2_text_id"
 93         android:layout_width="80dip"
 94         android:layout_height="40dip"
 95         android:gravity="left|center_vertical"
 96         android:layout_below="@id/sex2_text_id"
 97         android:layout_alignLeft="@id/sex2_text_id"
 98         android:layout_marginRight="5dip"
 99         android:layout_marginBottom="5dip"
100         android:text="爱好："
101         android:textSize="16sp"
102     />
103     <TextView android:layout_height="40dip" 
104         android:id="@+id/tv_info_likes" 
105         android:layout_width="wrap_content" 
106         android:layout_toRightOf="@id/like2_text_id"
107         android:layout_below="@id/sex2_text_id"
108         android:layout_marginRight="52dip"
109         android:gravity="left|center_vertical"/>
110 
111     <TextView android:id="@+id/contact2_text_id"
112         android:layout_width="80dip"
113         android:layout_height="40dip"
114         android:gravity="center_vertical|left"
115         android:layout_marginRight="5dip"
116         android:layout_below="@id/like2_text_id"
117         android:layout_marginBottom="5dip"
118         android:textSize="16sp"
119         android:text="联系电话："
120     />
121     
122     <TextView android:id="@+id/tv_info_phone"
123         android:layout_width="fill_parent"
124         android:layout_height="40dip"
125         android:layout_toRightOf="@id/contact2_text_id"
126         android:layout_alignParentRight="true"
127         android:layout_alignTop="@id/contact2_text_id"
128         android:gravity="center_vertical|left"
129     />
130     
131     <TextView android:id="@+id/train2_time_text_id"
132         android:layout_width="80dip"
133         android:layout_height="40dip"
134         android:gravity="center_vertical|left"
135         android:layout_marginRight="5dip"
136         android:layout_below="@id/contact2_text_id"
137         android:layout_marginBottom="5dip"
138         android:textSize="16sp"
139         android:text="入学日期"
140     />
141     
142     <TextView android:id="@+id/tv_info_train_date"
143         android:layout_width="fill_parent"
144         android:layout_height="40dip"
145         android:layout_toRightOf="@id/train2_time_text_id"
146         android:layout_alignParentRight="true"
147         android:layout_alignTop="@id/train2_time_text_id"
148         android:gravity="center_vertical|left"
149     />
150     
151     <Button android:id="@+id/back_to_list_id" 
152         android:layout_width="fill_parent" 
153         android:layout_height="wrap_content" 
154         android:text="返回列表界面" 
155         android:layout_below="@id/train2_time_text_id" 
156         android:layout_alignParentLeft="true"
157         android:layout_alignParentRight="true"
158         android:onClick="goBack">
159     </Button>
160 </RelativeLayout>

当然我们需要一个Activity来显示这些信息，在这里我创建了一个ShowStudentActivity。

   
   
   
   

    
    
    
    
 package cn.yj3g.student.activity; 
    
    
    
    
 
    
    
    
    
 import android.app.Activity; 
    
    
    
    
 import android.content.Intent; 
    
    
    
    
 import android.os.Bundle; 
    
    
    
    
 import android.view.View; 
    
    
    
    
 import android.widget.TextView; 
    
    
    
    
 import cn.yj3g.student.entry.Student; 
    
    
    
    
 import cn.yj3g.student.entry.TableContanst; 
    
    
    
    
 
    
    
    
    
 public class ShowStudentActivity extends Activity { 
    
    
    
    
 
    
    
    
    
  @Override 
    
    
    
    
 public void onCreate(Bundle savedInstanceState) { 
    
    
    
    
 super.onCreate(savedInstanceState); 
    
    
    
    
  setContentView(R.layout.student_info); 
    
    
    
    
  Intent intent = getIntent(); 
    
    
    
    
  Student student = (Student) intent.getSerializableExtra(TableContanst.STUDENT_TABLE); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_id)).setText(student.getId()+""); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_name)).setText(student.getName()); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_age)).setText(student.getAge()+""); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_sex)).setText(student.getSex()); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_likes)).setText(student.getLike()); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_train_date)).setText(student.getTrainDate()); 
    
    
    
    
  ((TextView)findViewById(R.id.tv_info_phone)).setText(student.getPhoneNumber()); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 public void goBack(View view) { 
    
    
    
    
  finish(); 
    
    
    
    
  } 
    
    
    
    
 }
   
   
   
   

界面效果如下：

最最重要的环节来了，我们做这个系统主要是为了管理学员，所以增加和修改学员信息是必不可少的，因此需要一个Activity来专门提供添加和修改学员信息。在这里还有一件重要的事情要做，那就是要设计添加和修改学员的界面，在这里可用用相对布局做比较简单。我在这里创建了一个AddStudentActivity来添加和修改学员信息，下面附上相关代码：

add_student.xml

  1 <?xml version="1.0" encoding="utf-8"?>
  2 
  3 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"  
  4     android:layout_width="fill_parent"  
  5     android:layout_height="fill_parent"  
  6     android:fillViewport="true"  
  7     android:scrollbarStyle="outsideInset" > 
  8 <RelativeLayout 
  9     android:orientation="vertical"
 10     android:layout_width="fill_parent"
 11     android:layout_height="fill_parent"
 12     android:padding="5dip"
 13     >
 14     
 15     <TextView android:id="@+id/tv_stu_text_id"
 16         android:layout_width="80dip"
 17         android:layout_height="40dip"
 18         android:gravity="center_vertical|right"
 19         android:layout_marginRight="5dip"
 20         android:layout_marginTop="5dip"
 21         android:layout_marginBottom="5dip"
 22         android:textSize="16sp"
 23         android:text="学员ID："
 24     />
 25     
 26     <TextView android:id="@+id/tv_stu_id"
 27         android:layout_width="fill_parent"
 28         android:layout_height="40dip"
 29         android:text="未分配ID"
 30         android:layout_toRightOf="@id/tv_stu_text_id"
 31         android:layout_alignParentRight="true"
 32         android:layout_alignTop="@id/tv_stu_text_id"
 33         android:gravity="center"
 34         android:background="#ffffff"
 35         android:textColor="#000000"
 36         android:textSize="16sp"
 37     />
 38     
 39     <TextView android:id="@+id/tv_name_text"
 40         android:layout_width="80dip"
 41         android:layout_height="40dip"
 42         android:gravity="center_vertical|right"
 43         android:layout_marginRight="5dip"
 44         android:layout_below="@id/tv_stu_text_id"
 45         android:layout_alignLeft="@id/tv_stu_text_id"
 46         android:layout_marginBottom="5dip"
 47         android:textSize="16sp"
 48         android:text="姓名："
 49     />
 50     
 51     <EditText android:id="@+id/et_name"
 52         android:layout_width="fill_parent"
 53         android:layout_height="40dip"
 54         android:layout_toRightOf="@id/tv_name_text"
 55         android:layout_alignParentRight="true"
 56         android:layout_alignTop="@id/tv_name_text"
 57         android:hint="请输入姓名"
 58         android:inputType="textPersonName"
 59         android:paddingLeft="20dip"/>
 60     
 61     <TextView android:id="@+id/tv_age_text"
 62         android:layout_width="80dip"
 63         android:layout_height="40dip"
 64         android:gravity="center_vertical|right"
 65         android:layout_marginRight="5dip"
 66         android:layout_below="@id/tv_name_text"
 67         android:layout_marginBottom="5dip"
 68         android:textSize="16sp"
 69         android:text="年龄："
 70     />
 71     
 72     <EditText android:id="@+id/et_age"
 73         android:layout_width="fill_parent"
 74         android:layout_height="40dip"
 75         android:layout_toRightOf="@id/tv_age_text"
 76         android:layout_alignParentRight="true"
 77         android:layout_alignTop="@id/tv_age_text"
 78         android:hint="请输入年龄"
 79         android:paddingLeft="20dip"
 80         android:maxLength="3"
 81         android:inputType="number"
 82     />
 83     
 84     <TextView android:id="@+id/tv_sex_text"
 85         android:layout_width="80dip"
 86         android:layout_height="40dip"
 87         android:gravity="center_vertical|right"
 88         android:layout_below="@id/tv_age_text"
 89         android:layout_alignLeft="@id/tv_age_text"
 90         android:layout_marginRight="5dip"
 91         android:layout_marginBottom="5dip"
 92         android:text="性别："
 93         android:textSize="16sp"
 94     />
 95     
 96     <RadioGroup
 97         android:id="@+id/rg_sex"
 98         android:layout_width="fill_parent"
 99         android:layout_height="40dip"
100         android:orientation="horizontal"
101         android:layout_toRightOf="@id/tv_sex_text"
102         android:layout_alignParentRight="true"
103         android:layout_alignTop="@id/tv_sex_text"
104         >
105         <RadioButton
106           android:id="@+id/rb_sex_male"
107           android:layout_width="wrap_content"
108           android:layout_height="wrap_content"
109           android:layout_weight="1"
110           android:text="男"
111           android:textSize="16sp"
112         />
113         <RadioButton android:layout_width="wrap_content" 
114         android:layout_height="wrap_content" 
115         android:text="女" 
116         android:id="@+id/rb_sex_female"
117         android:layout_weight="1"
118         android:textSize="16sp">
119         </RadioButton>
120     </RadioGroup>
121     
122     <TextView  android:id="@+id/tv_likes_text"
123         android:layout_width="80dip"
124         android:layout_height="40dip"
125         android:gravity="center_vertical|right"
126         android:layout_below="@id/rg_sex"
127         android:layout_alignLeft="@id/tv_sex_text"
128         android:layout_marginRight="5dip"
129         android:layout_marginBottom="5dip"
130         android:text="爱好："
131         android:textSize="16sp"
132     />
133     <CheckBox
134     android:id="@+id/box1"
135             android:layout_width="wrap_content" android:layout_height="wrap_content"
136             android:layout_toRightOf="@id/tv_likes_text"
137             android:layout_below="@+id/rg_sex"
138             android:layout_alignLeft="@+id/group1"
139             android:text="@string/box1"
140     ></CheckBox>
141     <CheckBox
142     android:id="@+id/box2"
143             android:layout_width="wrap_content" android:layout_height="wrap_content"
144             android:layout_toRightOf="@+id/box1"
145             android:layout_below="@+id/rg_sex"
146             android:layout_alignTop="@+id/box1"
147             android:text="@string/box2"
148     ></CheckBox>
149     <CheckBox
150     android:id="@+id/box3"
151             android:layout_width="wrap_content" android:layout_height="wrap_content"
152             android:layout_toRightOf="@+id/box2"
153             android:layout_below="@+id/rg_sex"
154             android:layout_alignTop="@+id/box2"
155             android:text="@string/box3"
156     ></CheckBox>
157     
158     <TextView android:id="@+id/tv_phone_text"
159         android:layout_width="80dip"
160         android:layout_height="40dip"
161         android:gravity="center_vertical|right"
162         android:layout_marginRight="5dip"
163         android:layout_below="@id/tv_likes_text"
164         android:layout_marginBottom="5dip"
165         android:textSize="16sp"
166         android:text="联系电话："
167     />
168     
169     <EditText android:id="@+id/et_phone"
170         android:layout_width="fill_parent"
171         android:layout_height="40dip"
172         android:layout_toRightOf="@id/tv_phone_text"
173         android:layout_alignParentRight="true"
174         android:layout_alignTop="@id/tv_phone_text"
175         android:hint="请输入手机号"
176         android:paddingLeft="20dip"
177         android:inputType="phone"
178         android:maxLength="11"
179     />
180     
181     <TextView android:id="@+id/tv_traindate_text"
182         android:layout_width="80dip"
183         android:layout_height="40dip"
184         android:gravity="center_vertical|right"
185         android:layout_marginRight="5dip"
186         android:layout_below="@id/tv_phone_text"
187         android:layout_marginBottom="5dip"
188         android:textSize="16sp"
189         android:text="入学日期"
190         
191     />
192     
193     <EditText android:id="@+id/et_traindate"
194         android:layout_width="fill_parent"
195         android:layout_height="40dip"
196         android:layout_toRightOf="@id/tv_traindate_text"
197         android:layout_alignParentRight="true"
198         android:layout_alignTop="@id/tv_traindate_text"
199         android:hint="点击选择日期"
200         android:inputType="date"
201         android:paddingLeft="20dip"
202         android:focusable="false"
203     />
204     <Button android:id="@+id/btn_save" 
205         android:layout_width="wrap_content" 
206         android:layout_height="wrap_content" 
207         android:text="保存" 
208         android:layout_below="@id/tv_traindate_text" 
209         android:layout_alignRight="@id/rg_sex">
210     </Button>
211     <Button android:id="@+id/btn_clear" 
212         android:layout_width="wrap_content" 
213         android:layout_height="wrap_content" 
214         android:text="重置" 
215         android:layout_below="@id/tv_traindate_text" 
216         android:layout_toLeftOf="@id/btn_save"
217         android:layout_marginRight="10dip">
218     </Button>
219 </RelativeLayout>
220 </ScrollView>

AddStudentActivity代码：

   
   
   
   

    
    
    
    
 package cn.yj3g.student.activity; 
    
    
    
    
 
    
    
    
    
 import java.io.Serializable; 
    
    
    
    
 import java.text.SimpleDateFormat; 
    
    
    
    
 import java.util.Calendar; 
    
    
    
    
 import java.util.Date; 
    
    
    
    
 import java.util.HashSet; 
    
    
    
    
 
    
    
    
    
 import android.app.Activity; 
    
    
    
    
 import android.app.DatePickerDialog; 
    
    
    
    
 import android.app.Dialog; 
    
    
    
    
 import android.content.ContentValues; 
    
    
    
    
 import android.content.Intent; 
    
    
    
    
 import android.database.sqlite.SQLiteDatabase; 
    
    
    
    
 import android.os.Bundle; 
    
    
    
    
 import android.view.View; 
    
    
    
    
 import android.view.View.OnClickListener; 
    
    
    
    
 import android.widget.Button; 
    
    
    
    
 import android.widget.CheckBox; 
    
    
    
    
 import android.widget.CompoundButton; 
    
    
    
    
 import android.widget.CompoundButton.OnCheckedChangeListener; 
    
    
    
    
 import android.widget.DatePicker; 
    
    
    
    
 import android.widget.EditText; 
    
    
    
    
 import android.widget.RadioButton; 
    
    
    
    
 import android.widget.RadioGroup; 
    
    
    
    
 import android.widget.TextView; 
    
    
    
    
 import android.widget.Toast; 
    
    
    
    
 import cn.yj3g.student.dao.StudentDao; 
    
    
    
    
 import cn.yj3g.student.db.StudentDBHelper; 
    
    
    
    
 import cn.yj3g.student.entry.Student; 
    
    
    
    
 import cn.yj3g.student.entry.TableContanst; 
    
    
    
    
 
    
    
    
    
 public class AddStudentActivity extends Activity implements OnClickListener { 
    
    
    
    
 
    
    
    
    
 private static final String TAG = "AddStudentActivity"; 
    
    
    
    
 private final static int DATE_DIALOG = 1; 
    
    
    
    
 private static final int DATE_PICKER_ID = 1; 
    
    
    
    
 private TextView idText; 
    
    
    
    
 private EditText nameText; 
    
    
    
    
 private EditText ageText; 
    
    
    
    
 private EditText phoneText; 
    
    
    
    
 private EditText dataText; 
    
    
    
    
 private RadioGroup group; 
    
    
    
    
 private RadioButton button1; 
    
    
    
    
 private RadioButton button2; 
    
    
    
    
 private CheckBox box1; 
    
    
    
    
 private CheckBox box2; 
    
    
    
    
 private CheckBox box3; 
    
    
    
    
 private Button restoreButton; 
    
    
    
    
 private String sex; 
    
    
    
    
 private Button resetButton; 
    
    
    
    
 private Long student_id; 
    
    
    
    
 
    
    
    
    
 private StudentDao dao; 
    
    
    
    
 private boolean isAdd = true; 
    
    
    
    
 
    
    
    
    
  @Override 
    
    
    
    
 public void onCreate(Bundle savedInstanceState) { 
    
    
    
    
 super.onCreate(savedInstanceState); 
    
    
    
    
  setContentView(R.layout.add_student); 
    
    
    
    
  idText = (TextView) findViewById(R.id.tv_stu_id); 
    
    
    
    
  nameText = (EditText) findViewById(R.id.et_name); 
    
    
    
    
  ageText = (EditText) findViewById(R.id.et_age); 
    
    
    
    
  button1 = (RadioButton) findViewById(R.id.rb_sex_female); 
    
    
    
    
  button2 = (RadioButton) findViewById(R.id.rb_sex_male); 
    
    
    
    
  phoneText = (EditText) findViewById(R.id.et_phone); 
    
    
    
    
  dataText = (EditText) findViewById(R.id.et_traindate); 
    
    
    
    
  group = (RadioGroup) findViewById(R.id.rg_sex); 
    
    
    
    
  box1 = (CheckBox) findViewById(R.id.box1); 
    
    
    
    
  box2 = (CheckBox) findViewById(R.id.box2); 
    
    
    
    
  box3 = (CheckBox) findViewById(R.id.box3); 
    
    
    
    
 
    
    
    
    
  restoreButton = (Button) findViewById(R.id.btn_save); 
    
    
    
    
  resetButton = (Button) findViewById(R.id.btn_clear); 
    
    
    
    
  dao = new StudentDao(new StudentDBHelper(this)); 
    
    
    
    
 
    
    
    
    
 // 设置监听 
    
    
    
    
  restoreButton.setOnClickListener(this); 
    
    
    
    
  resetButton.setOnClickListener(this); 
    
    
    
    
  dataText.setOnClickListener(this); 
    
    
    
    
  checkIsAddStudent(); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 /** 
    
    
    
    
  * 检查此时Activity是否用于添加学员信息 
    
    
    
    
 */ 
    
    
    
    
 private void checkIsAddStudent() { 
    
    
    
    
  Intent intent = getIntent(); 
    
    
    
    
  Serializable serial = intent 
    
    
    
    
  .getSerializableExtra(TableContanst.STUDENT_TABLE); 
    
    
    
    
 if (serial == null) { 
    
    
    
    
  isAdd = true; 
    
    
    
    
  dataText.setText(getCurrentDate()); 
    
    
    
    
  } else { 
    
    
    
    
  isAdd = false; 
    
    
    
    
  Student s = (Student) serial; 
    
    
    
    
  showEditUI(s); 
    
    
    
    
 
    
    
    
    
  } 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 /** 
    
    
    
    
  * 显示学员信息更新的UI 
    
    
    
    
 */ 
    
    
    
    
 private void showEditUI(Student student) { 
    
    
    
    
 // 先将Student携带的数据还原到student的每一个属性中去 
    
    
    
    
  student_id = student.getId(); 
    
    
    
    
  String name = student.getName(); 
    
    
    
    
 int age = student.getAge(); 
    
    
    
    
  String phone = student.getPhoneNumber(); 
    
    
    
    
  String data = student.getTrainDate(); 
    
    
    
    
  String like = student.getLike(); 
    
    
    
    
  String sex = student.getSex(); 
    
    
    
    
 if (sex.toString().equals("男")) { 
    
    
    
    
  button2.setChecked(true); 
    
    
    
    
  } else if (sex.toString().equals("女")) { 
    
    
    
    
  button1.setChecked(true); 
    
    
    
    
  } 
    
    
    
    
 if (like != null && !"".equals(like)) { 
    
    
    
    
 if (box1.getText().toString().indexOf(like) >= 0) { 
    
    
    
    
  box1.setChecked(true); 
    
    
    
    
  } 
    
    
    
    
 if (box2.getText().toString().indexOf(like) >= 0) { 
    
    
    
    
  box2.setChecked(true); 
    
    
    
    
  } 
    
    
    
    
 if (box3.getText().toString().indexOf(like) >= 0) { 
    
    
    
    
  box3.setChecked(true); 
    
    
    
    
  } 
    
    
    
    
  } 
    
    
    
    
 // 还原数据 
    
    
    
    
  idText.setText(student_id + ""); 
    
    
    
    
  nameText.setText(name + ""); 
    
    
    
    
  ageText.setText(age + ""); 
    
    
    
    
  phoneText.setText(phone + ""); 
    
    
    
    
  dataText.setText(data + ""); 
    
    
    
    
  setTitle("学员信息更新"); 
    
    
    
    
  restoreButton.setText("更新"); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 public void onClick(View v) { 
    
    
    
    
 // 收集数据 
    
    
    
    
  if (v == restoreButton) { 
    
    
    
    
 if (!checkUIInput()) {// 界面输入验证 
    
    
    
    
  return; 
    
    
    
    
  } 
    
    
    
    
  Student student = getStudentFromUI(); 
    
    
    
    
 if (isAdd) { 
    
    
    
    
 long id = dao.addStudent(student); 
    
    
    
    
  dao.closeDB(); 
    
    
    
    
 if (id > 0) { 
    
    
    
    
  Toast.makeText(this, "保存成功， ID=" + id, 0).show(); 
    
    
    
    
  finish(); 
    
    
    
    
  } else { 
    
    
    
    
  Toast.makeText(this, "保存失败，请重新输入！", 0).show(); 
    
    
    
    
  } 
    
    
    
    
  } else if (!isAdd) { 
    
    
    
    
 long id = dao.addStudent(student); 
    
    
    
    
  dao.closeDB(); 
    
    
    
    
 if (id > 0) { 
    
    
    
    
  Toast.makeText(this, "更新成功", 0).show(); 
    
    
    
    
  finish(); 
    
    
    
    
  } else { 
    
    
    
    
  Toast.makeText(this, "更新失败，请重新输入！", 0).show(); 
    
    
    
    
  } 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
  } else if (v == resetButton) { 
    
    
    
    
  clearUIData(); 
    
    
    
    
  } else if (v == dataText) { 
    
    
    
    
  showDialog(DATE_PICKER_ID); 
    
    
    
    
  } 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 /** 
    
    
    
    
  * 清空界面的数据 
    
    
    
    
 */ 
    
    
    
    
 private void clearUIData() { 
    
    
    
    
  nameText.setText(""); 
    
    
    
    
  ageText.setText(""); 
    
    
    
    
  phoneText.setText(""); 
    
    
    
    
  dataText.setText(""); 
    
    
    
    
  box1.setChecked(false); 
    
    
    
    
  box2.setChecked(false); 
    
    
    
    
  group.clearCheck(); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 /** 
    
    
    
    
  * 收集界面输入的数据，并将封装成Student对象 
    
    
    
    
 */ 
    
    
    
    
 private Student getStudentFromUI() { 
    
    
    
    
  String name = nameText.getText().toString(); 
    
    
    
    
 int age = Integer.parseInt(ageText.getText().toString()); 
    
    
    
    
  String sex = ((RadioButton) findViewById(group 
    
    
    
    
  .getCheckedRadioButtonId())).getText().toString(); 
    
    
    
    
  String likes = ""; 
    
    
    
    
 if (box1.isChecked()) { // basketball, football football 
    
    
    
    
  likes += box1.getText(); 
    
    
    
    
  } 
    
    
    
    
 if (box2.isChecked()) { 
    
    
    
    
 if (likes.equals("")) { 
    
    
    
    
  likes += box2.getText(); 
    
    
    
    
  } else { 
    
    
    
    
  likes += "," + box2.getText(); 
    
    
    
    
  } 
    
    
    
    
 if (likes.equals("")) { 
    
    
    
    
  likes += box3.getText(); 
    
    
    
    
  } else { 
    
    
    
    
  likes += "," + box3.getText(); 
    
    
    
    
  } 
    
    
    
    
  } 
    
    
    
    
  String trainDate = dataText.getText().toString(); 
    
    
    
    
  String phoneNumber = phoneText.getText().toString(); 
    
    
    
    
  String modifyDateTime = getCurrentDateTime(); 
    
    
    
    
  Student s=new Student(name, age, sex, likes, phoneNumber, trainDate, 
    
    
    
    
  modifyDateTime); 
    
    
    
    
 if (!isAdd) { 
    
    
    
    
  s.setId(Integer.parseInt(idText.getText().toString())); 
    
    
    
    
  dao.deleteStudentById(student_id); 
    
    
    
    
  } 
    
    
    
    
 return s; 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 /** 
    
    
    
    
  * 得到当前的日期时间 
    
    
    
    
 */ 
    
    
    
    
 private String getCurrentDateTime() { 
    
    
    
    
  SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); 
    
    
    
    
 return format.format(new Date()); 
    
    
    
    
  } 
    
    
    
    
 /** 
    
    
    
    
  * 得到当前的日期 
    
    
    
    
 */ 
    
    
    
    
 private String getCurrentDate() { 
    
    
    
    
  SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); 
    
    
    
    
 return format.format(new Date()); 
    
    
    
    
  } 
    
    
    
    
 /** 
    
    
    
    
  * 验证用户是否按要求输入了数据 
    
    
    
    
 */ 
    
    
    
    
 private boolean checkUIInput() { // name, age, sex 
    
    
    
    
  String name = nameText.getText().toString(); 
    
    
    
    
  String age = ageText.getText().toString(); 
    
    
    
    
 int id = group.getCheckedRadioButtonId(); 
    
    
    
    
  String message = null; 
    
    
    
    
  View invadView = null; 
    
    
    
    
 if (name.trim().length() == 0) { 
    
    
    
    
  message = "请输入姓名！"; 
    
    
    
    
  invadView = nameText; 
    
    
    
    
  } else if (age.trim().length() == 0) { 
    
    
    
    
  message = "请输入年龄！"; 
    
    
    
    
  invadView = ageText; 
    
    
    
    
  } else if (id == -1) { 
    
    
    
    
  message = "请选择性别！"; 
    
    
    
    
  } 
    
    
    
    
 if (message != null) { 
    
    
    
    
  Toast.makeText(this, message, 0).show(); 
    
    
    
    
 if (invadView != null) 
    
    
    
    
  invadView.requestFocus(); 
    
    
    
    
 return false; 
    
    
    
    
  } 
    
    
    
    
 return true; 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 private DatePickerDialog.OnDateSetListener onDateSetListener = new DatePickerDialog.OnDateSetListener() { 
    
    
    
    
  @Override 
    
    
    
    
 public void onDateSet(DatePicker view, int year, int monthOfYear, 
    
    
    
    
 int dayOfMonth) { 
    
    
    
    
  dataText.setText(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth); 
    
    
    
    
  } 
    
    
    
    
  }; 
    
    
    
    
 
    
    
    
    
  @Override 
    
    
    
    
 protected Dialog onCreateDialog(int id) { 
    
    
    
    
 switch (id) { 
    
    
    
    
 case DATE_PICKER_ID: 
    
    
    
    
 return new DatePickerDialog(this, onDateSetListener, 2011, 8, 14); 
    
    
    
    
  } 
    
    
    
    
 return null; 
    
    
    
    
  } 
    
    
    
    
 }
   
   
   
   

界面效果如下：

修改界面：

在这里我还做了一个额外的功能就是模糊查找，有想法的可以参考下。

StudentSearch代码：

package cn.yj3g.student.activity;

import cn.yj3g.student.dao.StudentDao;
import cn.yj3g.student.db.StudentDBHelper;
import cn.yj3g.student.entry.TableContanst;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

public class StudentSearch extends Activity implements OnClickListener {
    private EditText nameText;
    private Button button;
    private Button reButton;
    private Cursor cursor;
    private SimpleCursorAdapter adapter;
    private ListView listView;
    private StudentDao dao;
    private Button returnButton;
    private LinearLayout layout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.search);
        nameText = (EditText) findViewById(R.id.et_srarch);
        layout=(LinearLayout) findViewById(R.id.linersearch);
        button = (Button) findViewById(R.id.bn_sure_search);
        reButton = (Button) findViewById(R.id.bn_return);
        listView = (ListView) findViewById(R.id.searchListView);
        returnButton = (Button) findViewById(R.id.return_id);
        dao = new StudentDao(new StudentDBHelper(this));
        
        
        reButton.setOnClickListener(this);
        returnButton.setOnClickListener(this);
        button.setOnClickListener(this);    
    }

    @Override
    public void onClick(View v) {
        if (v == button) {
            reButton.setVisibility(View.GONE);    
            button.setVisibility(View.GONE);
            nameText.setVisibility(View.GONE);
            layout.setVisibility(View.VISIBLE);
            String name = nameText.getText().toString();
            cursor = dao.findStudent(name);
            if (!cursor.moveToFirst()) {
                Toast.makeText(this, "没有所查学员信息！", Toast.LENGTH_SHORT).show();
            } else
                //如果有所查询的信息，则将查询结果显示出来
                adapter = new SimpleCursorAdapter(this, R.layout.find_student_list_item,
                        cursor, new String[] { TableContanst.StudentColumns.ID,
                                TableContanst.StudentColumns.NAME,
                                TableContanst.StudentColumns.AGE,
                                TableContanst.StudentColumns.SEX,
                                TableContanst.StudentColumns.LIKES,
                                TableContanst.StudentColumns.PHONE_NUMBER,
                                TableContanst.StudentColumns.TRAIN_DATE },
                        new int[] { R.id.tv_stu_id, R.id.tv_stu_name,
                                R.id.tv_stu_age, R.id.tv_stu_sex,
                                R.id.tv_stu_likes, R.id.tv_stu_phone,
                                R.id.tv_stu_traindate });
            listView.setAdapter(adapter);
        }else if(v==reButton|v==returnButton){
            finish();
        }
    }
}

search.xml

   
   
   
   

    
    
    
    
 <?xml version="1.0" encoding="utf-8"?> 
    
    
    
    
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    
    
    
    
  android:orientation="vertical" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="fill_parent" > 
    
    
    
    
 <EditText 
    
    
    
    
  android:id="@+id/et_srarch" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content" 
    
    
    
    
  android:hint="请输入学员姓名" 
    
    
    
    
  android:inputType="textPersonName" 
    
    
    
    
 /> 
    
    
    
    
 <Button 
    
    
    
    
  android:id="@+id/bn_sure_search" 
    
    
    
    
  android:gravity="center" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content" 
    
    
    
    
  android:text="确定" 
    
    
    
    
 /> 
    
    
    
    
 <Button 
    
    
    
    
  android:id="@+id/bn_return" 
    
    
    
    
  android:gravity="center" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content" 
    
    
    
    
  android:text="返回" 
    
    
    
    
 /> 
    
    
    
    
 
    
    
    
    
 <LinearLayout android:id="@+id/linersearch" 
    
    
    
    
  android:orientation="vertical" 
    
    
    
    
  android:visibility="gone" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content"> 
    
    
    
    
 <ListView 
    
    
    
    
  android:id="@+id/searchListView" 
    
    
    
    
  android:layout_weight="1" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content"/> 
    
    
    
    
 <Button 
    
    
    
    
  android:id="@+id/return_id" 
    
    
    
    
  android:layout_width="fill_parent" 
    
    
    
    
  android:layout_height="wrap_content" 
    
    
    
    
  android:text="返回" 
    
    
    
    
 /> 
    
    
    
    
 </LinearLayout> 
    
    
    
    
 </LinearLayout>
   
   
   
   

find_student_list_item.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="horizontal" android:layout_width="fill_parent"
 4     android:layout_height="wrap_content">
 5     <ImageView android:layout_width="fill_parent"
 6         android:layout_height="wrap_content" android:layout_weight="1"
 7         android:background="@drawable/icon" />
 8         <TextView android:id="@+id/tv_stu_id" android:layout_width="fill_parent"
 9         android:layout_height="wrap_content" android:layout_weight="1" />
10     <TextView android:id="@+id/tv_stu_name" android:layout_width="fill_parent"
11         android:layout_height="wrap_content" android:layout_weight="1" />
12     <TextView android:id="@+id/tv_stu_age" android:layout_width="fill_parent"
13         android:layout_height="wrap_content" android:layout_weight="1" />
14     <TextView android:id="@+id/tv_stu_sex" android:layout_width="fill_parent"
15         android:layout_height="wrap_content" android:layout_weight="1" />
16     <TextView android:id="@+id/tv_stu_likes" android:layout_width="fill_parent"
17         android:layout_height="wrap_content" android:layout_weight="1" />
18     <TextView android:id="@+id/tv_stu_phone"
19         android:layout_width="fill_parent" android:layout_height="wrap_content"
20         android:layout_weight="1" />
21     <TextView android:id="@+id/tv_stu_traindate" android:layout_width="fill_parent"
22         android:layout_height="wrap_content" android:layout_weight="1" />
23 
24 </LinearLayout>

界面效果如下：

查询结果界面：

在这里还牵扯到了一些常量和数据库的连接以及增删改查等操作，我用我们老师的方法将他们分别放在不同的包里。下面附上代码：

StudentDao类

   
   
   
   

    
    
    
    
 package cn.yj3g.student.dao; 
    
    
    
    
 
    
    
    
    
 import java.util.ArrayList; 
    
    
    
    
 import java.util.HashMap; 
    
    
    
    
 import java.util.List; 
    
    
    
    
 import java.util.Map; 
    
    
    
    
 import android.content.ContentValues; 
    
    
    
    
 import android.database.Cursor; 
    
    
    
    
 import android.database.sqlite.SQLiteDatabase; 
    
    
    
    
 import android.view.View; 
    
    
    
    
 import android.widget.SimpleCursorAdapter; 
    
    
    
    
 import android.widget.TextView; 
    
    
    
    
 import cn.yj3g.student.activity.R; 
    
    
    
    
 import cn.yj3g.student.db.StudentDBHelper; 
    
    
    
    
 import cn.yj3g.student.entry.Student; 
    
    
    
    
 import cn.yj3g.student.entry.TableContanst; 
    
    
    
    
 
    
    
    
    
 public class StudentDao { 
    
    
    
    
 
    
    
    
    
 private StudentDBHelper dbHelper; 
    
    
    
    
 private Cursor cursor; 
    
    
    
    
 public StudentDao(StudentDBHelper dbHelper) { 
    
    
    
    
 this.dbHelper = dbHelper; 
    
    
    
    
  } 
    
    
    
    
 // 添加一个Student对象数据到数据库表 
    
    
    
    
  public long addStudent(Student s) { 
    
    
    
    
 
    
    
    
    
  ContentValues values = new ContentValues(); 
    
    
    
    
  values.put(TableContanst.StudentColumns.NAME, s.getName()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.AGE, s.getAge()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.SEX, s.getSex()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.LIKES, s.getLike()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.PHONE_NUMBER, s.getPhoneNumber()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.TRAIN_DATE, s.getTrainDate()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.MODIFY_TIME, s.getModifyDateTime()); 
    
    
    
    
 return dbHelper.getWritableDatabase().insert(TableContanst.STUDENT_TABLE, null, values); 
    
    
    
    
 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 // 删除一个id所对应的数据库表student的记录 
    
    
    
    
  public int deleteStudentById(long id) { 
    
    
    
    
 
    
    
    
    
 return dbHelper.getWritableDatabase().delete(TableContanst.STUDENT_TABLE, 
    
    
    
    
  TableContanst.StudentColumns.ID + "=?", new String[] { id + "" }); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 // 更新一个id所对应数据库表student的记录 
    
    
    
    
  public int updateStudent(Student s) { 
    
    
    
    
 
    
    
    
    
  ContentValues values = new ContentValues(); 
    
    
    
    
  values.put(TableContanst.StudentColumns.NAME, s.getName()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.AGE, s.getAge()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.SEX, s.getSex()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.LIKES, s.getLike()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.PHONE_NUMBER, s.getPhoneNumber()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.TRAIN_DATE, s.getTrainDate()); 
    
    
    
    
  values.put(TableContanst.StudentColumns.MODIFY_TIME, s.getModifyDateTime()); 
    
    
    
    
 return dbHelper.getWritableDatabase().update(TableContanst.STUDENT_TABLE, values, 
    
    
    
    
  TableContanst.StudentColumns.ID + "=?", new String[] { s.getId() + "" }); 
    
    
    
    
 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 // 查询所有的记录 
    
    
    
    
  public List<Map<String,Object>> getAllStudents() { //modify_time desc 
    
    
    
    
  
    
    
    
    
  List<Map<String, Object>> data = new ArrayList<Map<String,Object>>(); 
    
    
    
    
  Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null, null, null, 
    
    
    
    
 null, null, TableContanst.StudentColumns.MODIFY_TIME+" desc"); 
    
    
    
    
 while(cursor.moveToNext()) { 
    
    
    
    
  Map<String, Object> map = new HashMap<String, Object>(8); 
    
    
    
    
 long id = cursor.getInt(cursor.getColumnIndex(TableContanst.StudentColumns.ID)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.ID, id); 
    
    
    
    
  String name = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.NAME)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.NAME, name); 
    
    
    
    
 int age = cursor.getInt(cursor.getColumnIndex(TableContanst.StudentColumns.AGE)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.AGE, age); 
    
    
    
    
  String sex = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.SEX)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.SEX, sex); 
    
    
    
    
  String likes = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.LIKES)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.LIKES, likes); 
    
    
    
    
  String phone_number = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.PHONE_NUMBER)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.PHONE_NUMBER, phone_number); 
    
    
    
    
  String train_date = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.TRAIN_DATE)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.TRAIN_DATE, train_date); 
    
    
    
    
  String modify_time = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.MODIFY_TIME)); 
    
    
    
    
  map.put(TableContanst.StudentColumns.MODIFY_TIME, modify_time); 
    
    
    
    
  data.add(map); 
    
    
    
    
  } 
    
    
    
    
 return data; 
    
    
    
    
  } 
    
    
    
    
 //模糊查询一条记录 
    
    
    
    
  public Cursor findStudent(String name){ 
    
    
    
    
 
    
    
    
    
  Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null, "name like ?", 
    
    
    
    
 new String[] { "%" + name + "%" }, null, null, null,null); 
    
    
    
    
 return cursor; 
    
    
    
    
  } 
    
    
    
    
 //按姓名进行排序 
    
    
    
    
  public Cursor sortByName(){ 
    
    
    
    
  Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null,null, 
    
    
    
    
 null, null, null,TableContanst.StudentColumns.NAME); 
    
    
    
    
 return cursor; 
    
    
    
    
  } 
    
    
    
    
 //按入学日期进行排序 
    
    
    
    
  public Cursor sortByTrainDate(){ 
    
    
    
    
  Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null,null, 
    
    
    
    
 null, null, null,TableContanst.StudentColumns.TRAIN_DATE); 
    
    
    
    
 return cursor; 
    
    
    
    
  } 
    
    
    
    
 //按学号进行排序 
    
    
    
    
  public Cursor sortByID(){ 
    
    
    
    
  Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null,null, 
    
    
    
    
 null, null, null,TableContanst.StudentColumns.ID); 
    
    
    
    
 return cursor; 
    
    
    
    
  } 
    
    
    
    
 public void closeDB() { 
    
    
    
    
  dbHelper.close(); 
    
    
    
    
  } 
    
    
    
    
 //自定义的方法通过View和Id得到一个student对象 
    
    
    
    
  public Student getStudentFromView(View view, long id) { 
    
    
    
    
  TextView nameView = (TextView) view.findViewById(R.id.tv_stu_name); 
    
    
    
    
  TextView ageView = (TextView) view.findViewById(R.id.tv_stu_age); 
    
    
    
    
  TextView sexView = (TextView) view.findViewById(R.id.tv_stu_sex); 
    
    
    
    
  TextView likeView = (TextView) view.findViewById(R.id.tv_stu_likes); 
    
    
    
    
  TextView phoneView = (TextView) view.findViewById(R.id.tv_stu_phone); 
    
    
    
    
  TextView dataView = (TextView) view.findViewById(R.id.tv_stu_traindate); 
    
    
    
    
  String name = nameView.getText().toString(); 
    
    
    
    
 int age = Integer.parseInt(ageView.getText().toString()); 
    
    
    
    
  String sex = sexView.getText().toString(); 
    
    
    
    
  String like = likeView.getText().toString(); 
    
    
    
    
  String phone = phoneView.getText().toString(); 
    
    
    
    
  String data = dataView.getText().toString(); 
    
    
    
    
  Student student = new Student(id, name, age, sex, like, phone, data,null); 
    
    
    
    
 return student; 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 }
   
   
   
   

StudentDBHelper类

 1 package cn.yj3g.student.db;
 2 
 3 import cn.yj3g.student.entry.TableContanst;
 4 import android.content.Context;
 5 import android.database.sqlite.SQLiteDatabase;
 6 import android.database.sqlite.SQLiteDatabase.CursorFactory;
 7 import android.database.sqlite.SQLiteOpenHelper;
 8 import android.util.Log;
 9 
10 public class StudentDBHelper extends SQLiteOpenHelper {
11 
12     private static final String TAG = "StudentDBHelper";
13 
14     public static final String DB_NAME = "student_manager.db";
15     public static final int VERSION = 1;
16     //构造方法
17     public StudentDBHelper(Context context, String name, CursorFactory factory, int version) {
18         super(context, name, factory, version);
19 
20     }
21 
22     public StudentDBHelper(Context context) {
23         this(context, DB_NAME, null, VERSION);
24     }
25     //创建数据库
26     @Override
27     public void onCreate(SQLiteDatabase db) {
28         Log.v(TAG, "onCreate");
29         db.execSQL("create table "
30                 + TableContanst.STUDENT_TABLE
31                 + "(_id Integer primary key AUTOINCREMENT,"
32                 + "name char,age integer, sex char, likes char, phone_number char,train_date date, "
33                 + "modify_time DATETIME)");
34     }
35     //更新数据库
36     @Override
37     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
38         Log.v(TAG, "onUpgrade");
39     }
40 
41 }

Student类：

   
   
   
   

    
    
    
    
 package cn.yj3g.student.entry; 
    
    
    
    
 
    
    
    
    
 import java.io.Serializable; 
    
    
    
    
 
    
    
    
    
 import android.view.View; 
    
    
    
    
 import android.widget.TextView; 
    
    
    
    
 import cn.yj3g.student.activity.R; 
    
    
    
    
 
    
    
    
    
 public class Student implements Serializable{ 
    
    
    
    
 
    
    
    
    
 private long id; 
    
    
    
    
 private String name; 
    
    
    
    
 private int age; 
    
    
    
    
 private String sex; 
    
    
    
    
 private String like; 
    
    
    
    
 private String phoneNumber; 
    
    
    
    
 private String trainDate; 
    
    
    
    
 private String modifyDateTime; 
    
    
    
    
 
    
    
    
    
 
    
    
    
    
 public Student() { 
    
    
    
    
 super(); 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 public Student(long id, String name, int age, String sex, String like, String phoneNumber, 
    
    
    
    
  String trainDate, String modifyDateTime) { 
    
    
    
    
 super(); 
    
    
    
    
 this.id = id; 
    
    
    
    
 this.name = name; 
    
    
    
    
 this.age = age; 
    
    
    
    
 this.sex = sex; 
    
    
    
    
 this.like = like; 
    
    
    
    
 this.phoneNumber = phoneNumber; 
    
    
    
    
 this.trainDate = trainDate; 
    
    
    
    
 this.modifyDateTime = modifyDateTime; 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 public Student(String name, int age, String sex, String like, String phoneNumber, 
    
    
    
    
  String trainDate, String modifyDateTime) { 
    
    
    
    
 super(); 
    
    
    
    
 this.name = name; 
    
    
    
    
 this.age = age; 
    
    
    
    
 this.sex = sex; 
    
    
    
    
 this.like = like; 
    
    
    
    
 this.phoneNumber = phoneNumber; 
    
    
    
    
 this.trainDate = trainDate; 
    
    
    
    
 this.modifyDateTime = modifyDateTime; 
    
    
    
    
  } 
    
    
    
    
 
    
    
    
    
 public long getId() { 
    
    
    
    
 return id; 
    
    
    
    
  } 
    
    
    
    
 public void setId(long id) { 
    
    
    
    
 this.id = id; 
    
    
    
    
  } 
    
    
    
    
 public String getName() { 
    
    
    
    
 return name; 
    
    
    
    
  } 
    
    
    
    
 public void setName(String name) { 
    
    
    
    
 this.name = name; 
    
    
    
    
  } 
    
    
    
    
 public int getAge() { 
    
    
    
    
 return age; 
    
    
    
    
  } 
    
    
    
    
 public void setAge(int age) { 
    
    
    
    
 this.age = age; 
    
    
    
    
  } 
    
    
    
    
 public String getSex() { 
    
    
    
    
 return sex; 
    
    
    
    
  } 
    
    
    
    
 public void setSex(String sex) { 
    
    
    
    
 this.sex = sex; 
    
    
    
    
  } 
    
    
    
    
 public String getLike() { 
    
    
    
    
 return like; 
    
    
    
    
  } 
    
    
    
    
 public void setLike(String like) { 
    
    
    
    
 this.like = like; 
    
    
    
    
  } 
    
    
    
    
 public String getPhoneNumber() { 
    
    
    
    
 return phoneNumber; 
    
    
    
    
  } 
    
    
    
    
 public void setPhoneNumber(String phoneNumber) { 
    
    
    
    
 this.phoneNumber = phoneNumber; 
    
    
    
    
  } 
    
    
    
    
 public String getTrainDate() { 
    
    
    
    
 return trainDate; 
    
    
    
    
  } 
    
    
    
    
 public void setTrainDate(String trainDate) { 
    
    
    
    
 this.trainDate = trainDate; 
    
    
    
    
  } 
    
    
    
    
 public String getModifyDateTime() { 
    
    
    
    
 return modifyDateTime; 
    
    
    
    
  } 
    
    
    
    
 public void setModifyDateTime(String modifyDateTime) { 
    
    
    
    
 this.modifyDateTime = modifyDateTime; 
    
    
    
    
  } 
    
    
    
    
  @Override 
    
    
    
    
 public int hashCode() { 
    
    
    
    
 final int prime = 31; 
    
    
    
    
 int result = 1; 
    
    
    
    
  result = prime * result + age; 
    
    
    
    
  result = prime * result + (int) (id ^ (id >>> 32)); 
    
    
    
    
  result = prime * result + ((like == null) ? 0 : like.hashCode()); 
    
    
    
    
  result = prime * result + ((modifyDateTime == null) ? 0 : modifyDateTime.hashCode()); 
    
    
    
    
  result = prime * result + ((name == null) ? 0 : name.hashCode()); 
    
    
    
    
  result = prime * result + ((phoneNumber == null) ? 0 : phoneNumber.hashCode()); 
    
    
    
    
  result = prime * result + ((sex == null) ? 0 : sex.hashCode()); 
    
    
    
    
  result = prime * result + ((trainDate == null) ? 0 : trainDate.hashCode()); 
    
    
    
    
 return result; 
    
    
    
    
  } 
    
    
    
    
  @Override 
    
    
    
    
 public boolean equals(Object obj) { 
    
    
    
    
 if (this == obj) 
    
    
    
    
 return true; 
    
    
    
    
 if (obj == null) 
    
    
    
    
 return false; 
    
    
    
    
 if (getClass() != obj.getClass()) 
    
    
    
    
 return false; 
    
    
    
    
  Student other = (Student) obj; 
    
    
    
    
 if (age != other.age) 
    
    
    
    
 return false; 
    
    
    
    
 if (id != other.id) 
    
    
    
    
 return false; 
    
    
    
    
 if (like == null) { 
    
    
    
    
 if (other.like != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!like.equals(other.like)) 
    
    
    
    
 return false; 
    
    
    
    
 if (modifyDateTime == null) { 
    
    
    
    
 if (other.modifyDateTime != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!modifyDateTime.equals(other.modifyDateTime)) 
    
    
    
    
 return false; 
    
    
    
    
 if (name == null) { 
    
    
    
    
 if (other.name != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!name.equals(other.name)) 
    
    
    
    
 return false; 
    
    
    
    
 if (phoneNumber == null) { 
    
    
    
    
 if (other.phoneNumber != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!phoneNumber.equals(other.phoneNumber)) 
    
    
    
    
 return false; 
    
    
    
    
 if (sex == null) { 
    
    
    
    
 if (other.sex != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!sex.equals(other.sex)) 
    
    
    
    
 return false; 
    
    
    
    
 if (trainDate == null) { 
    
    
    
    
 if (other.trainDate != null) 
    
    
    
    
 return false; 
    
    
    
    
  } else if (!trainDate.equals(other.trainDate)) 
    
    
    
    
 return false; 
    
    
    
    
 return true; 
    
    
    
    
  } 
    
    
    
    
  @Override 
    
    
    
    
 public String toString() { 
    
    
    
    
 return "Student [id=" + id + ", name=" + name + "]"; 
    
    
    
    
  } 
    
    
    
    
 }
   
   
   
   

常量TableContanst类：

 1 package cn.yj3g.student.entry;
 2 
 3 public final class TableContanst {
 4     
 5     public static final String STUDENT_TABLE = "student";
 6     
 7     public static final class StudentColumns {
 8         public static final String ID = "_id";
 9         public static final String NAME = "name";
10         public static final String AGE = "age";
11         public static final String SEX = "sex";
12         public static final String LIKES = "likes";
13         public static final String PHONE_NUMBER = "phone_number";
14         public static final String TRAIN_DATE = "train_date";
15         public static final String MODIFY_TIME = "modify_time";
16     }
17 }

最后我将我的values里的strings.xml和AndroidManifest.xml附在下面，以供大家参考。

strings.xml：

   
   
   
   

    
    
    
    
 <?xml version="1.0" encoding="utf-8"?> 
    
    
    
    
 <resources> 
    
    
    
    
 <string name="hello">Hello World, TextStudentManager!</string> 
    
    
    
    
 <string name="app_name">学员管理系统</string> 
    
    
    
    
 <string name="information_write">学员信息修改</string> 
    
    
    
    
 <string name="button1">男</string> 
    
    
    
    
 <string name="button2">女</string> 
    
    
    
    
 <string name="box1">唱歌</string> 
    
    
    
    
 <string name="box2">跳舞</string> 
    
    
    
    
 <string name="box3">健身</string> 
    
    
    
    
 <string name="myButton">添加学员信息</string> 
    
    
    
    
 <string name="spinner">请选择</string> 
    
    
    
    
 </resources>
   
   
   
   

AndroidManifest.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3       package="cn.yj3g.student.activity"
 4       android:versionCode="1"
 5       android:versionName="1.0">
 6     <uses-sdk android:minSdkVersion="8" />
 7 
 8     <application android:icon="@drawable/student"  android:label="@string/app_name">
 9         <activity android:name=".StudentListActivity"
10                   android:label="学员信息列表">
11             <intent-filter>
12                 <action android:name="android.intent.action.MAIN" />
13                 <category android:name="android.intent.category.LAUNCHER" />
14             </intent-filter>
15         </activity>
16         
17          <activity android:name=".AddStudentActivity"
18                   android:label="学员信息添加">
19         </activity>
20           <activity android:name=".ShowStudentActivity"
21                   android:label="学员详细信息">
22         </activity>
23          <activity android:name=".StudentSearch"
24                   android:label="学员信息查询">
25         </activity>
26          <activity android:name=".SearchResult"
27                   android:label="查询结果">
28         </activity>
29         <provider 
30         android:name=".MyStudentManagerProvider"
31         android:authorities="cn.yj3g.student.activity.MyStudentManagerProvider"></provider>
32         <uses-library android:name="android.test.runner" />  <!-- android测试包 -->
33         
34     </application>
35     <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission> 
36     <instrumentation android:name="android.test.InstrumentationTestRunner"
37           android:targetPackage="cn.yj3g.student.activity" android:label="Tests for My App" />
38 </manifest>

由于自己也是初学者，所以大家发现什么问题，可以留言，大家一起学习。

原文地址：  http://www.cnblogs.com/zxl-jay/archive/2011/09/21/2182890.html#2302140